Permutation-padlock.



C. w. PETERsoN. PERMUTATION PADLOCK.

APPLICATION FILED MAR. 27, i917.

Ptent-ed Sept. 2

E@ im INVENTOR ATTORNEY CHARLIE W. IPETERSON, OF GRAYSON, NEBRASKA. f

PERMUTATION-PADLOCK.

Application led March 27, 1917. Serial No.l 157,796. l

To all whom it may concern y Be it known that I, CHARLIE W. PETER- soN,a citizen of the United States, residing at Grayson, in the county ofSheridan and State of Nebraska, have invented certain new and usefulImprovements in Permutation-Padlocks, of which the following is aspecification. j

This invention relates to 'a permutation padlock and the primary objectof theiinvention is to provide a locking mechanism arranged withina'casing and adapted to be so operated by a person understanding thecombination of the lock as to permit the shackle to be unlocked withoutthe use of keys or the like. V

The invention also has for one of its objects to provide a pair ofcoperating barrels having helical raised portions adapted will requireproper pre-determined movement imparted alternately to the keys toaccomplish the desired result.

A further object of this invention is the provision of a permutationpadlock which consists of comparatively few parts and is simple inconstruction, but durable and well adapted to withstand the roughusageto which devices of this character are ordinarily subjected.

For a full description of the invention and the advantages and meritsthereof, reference is to be had to the following description and theaccompanying drawings, wherein is illustrated the preferred form ofvmyinvention, in which;

Figure 1 is a longitudinal'section through the lock casing, disclosingthe operating mechanism mounted therein.

Fig. 2 is a section on-the line 2 2 of Fig. l.

Fig. 3 is an end view, disclosing the different positions taken by thekey handles duringthe operation of the locking mechanism for unlockingthel shackle.

n Referring to the drawing, wherein is illustrated the preferred form ofmy invention, and inwhich like numerals'of reference in'- dicatecorresponding parts throughout.. the several views, the casing 1 may beof any preferred shape and'has pivoted in one end, the shackle 2 theopposite end of which projects through an opening in the end of thecasing to be locked in position within the casing when the shackle isclosed. Mounted within the casingat the opposite end thereof is abracket 3 which comprises a strip of material having its intermediateportion sccured to the end wall of the casing by a suitspecification orLetter; Patent. Patented Sept25, 191 *7.

able fastening element L1. From this poi-nt,

the ends of the bracket are bent to be disposedin `spaced relation tothek end wall of the casing. Mounted upon the ends of the brackets is apair of barrels` 5 and 6. The

central portion of each barrel has a square opening for thereceptionofthe shanks 7 ofthe operating keys 8. The operating keys projectoutwardly beyond the end of the casing sothat they may ,be operated fromthe exterior thereof. The opposite ends of the` barrels are eachprovided with short journals, mounted inopenings provided ina shelf 9extending transversely across the casing between` the side walls thereofand engaged with the end of each barrel, sothat the said barrels arerotatably mounted and operate between the shelf 9 and the ends of thebracket 3.

The free end of the shackle within the casing is provided with va notch1,0 adapted to be engaged by the end of alocking latch 11, pivotallymounted within the casing. The locking latch has. an arm 12 throughwhich is extended an operating rod 13 having a head 14 formed on itsterminal. The opposite end of the operating rod: is extended through acentral opening in the shelf 9, and has its terminal provided with aconnecting rod 15which comprises a short length of rod exactly equal inlengthto the distance between the proximate surfacesof the barrels 5 and6. This rod is,'therefore, disposed at right angles to the operating rod13 and is preferably integrally formed therewith. The ends of the rod 15are normally in engagement with the surfaces of the barrels 5 and 6. Acollar 1G .is mounted intermediate the ends of the rod 13, and a 'coilexpansion spring 17 is interposed between the collar and the shelf 9,thereby tending to hold the head 14 in raised position, and theconnecting rod .15 also in raised position.

The barrel 5 is provided adjacent each endwith a helical rib or raisedthread 18. The upper and lower ribs are independent `of each other asclearly shown by Fig. 1and the lower terminal of the upper rib is spacedabove the upper vterminal of the lower rib for' Y a distancesubstantially equal to the pitch of the said helical ribs. On the barrel6,1 have provided a rib 19 disposed intermediate the ends of the barrel6, and of helical ,formation and having its terminals spacedia'part fora distance equalV to the space 'between the adjacent ends of the helicalribs on the barrel 5. y

Assuming the parts to be in the position shownv by Fig. 1 of thedrawing, the operation of the device will be as follows:

The key 8 liked to the barrel 5, will be rotated to completethree-quarters of a complete turn. During this movement, the helical rib18 at the upper end of the vbarrel 5' lwilll engage the end of the rod15, and force the same downwardly against the action of the coil spring17.v This will bring the opposite end of the connecting rod 15positions.

below the end of the helical rib`19 on the barrel 6. This barrel willthen be rotated for three-quarters of a turn by its corresponding key.This will bring the two keys 8 tothe positions shownfby dotted lines inFig. 3, and designated as the lirst and second This rotation' of thebarrel `6 will bring the connecting rodv15 downwardly so that theopposite end' will be disposed beneath the end ofthe lower helical rib18 on the barrel `5. The' key 8, of the barrel 5, will again berotated,but this rotation need only continue until such time as the head 14engages on the arm 12 to tilt the -lat-ch for disengaging the same fromthe notch 10. The shackle 2' may then be opened. `Fori-placing vthelatch; back into operative position, it is merely necessary to turn thekeys'to permit the spring 16 to raise the connecting rod`15, since itwill be observed that the ends of each helical rib are spa-ced apartysufficiently to permit lthe longitudinal ypassage of the rod 15. Theflat spring QO'engaged with the latch tends to normally hold the same inlocked position.

vFromthe foregoing it will be, observed y that a very simple anddurablel permutation `padlock has been provided, the details of whichembody the preferred form. I desire v .I claim;

1. A lock comprising a casing having barrels mounted therein, thebarrels being arranged in spaced relation and provided with helicalvthreads extending partially around the cylinder, operating meansdisposed within the casing and associated with the said cylinderswhereby engagement with the said helical threads will operate the saidoperating means `when the barrels are rotated, a shackle, and a latchassociated with the operating means and engageable with the saidshackle.

2. A lock comprising a casing provided on its interior with a pair ofspaced apart barrels, means eXteriorly mounted for rotating thebarrels,kan operating` rod having a connecting rod, the terminals of whichengage the proximate surfaces of the'barrel, and means mounted onthebarrels and engageable with the ends of the said connecting rod forlongitudinally moving the said rod when the barrels are rotated by thesaid means.

3. A lock comprising a casing having a latch pivotally mounted therein,ashackle engageable with the latch for holdingfthe shackle in lockedposition, an operating rod,

a pair of barrels rotatably mounted andfva'rranged in spaced relation, aconnecting rod carried by the operating rod and engageable with theproximate surfaces of thebarrels, one of said barrels having a pair ofhelical threads, the other barrel having "a single helical thread, andmeans for Vrotating the barrels whereby engagement ofthe said threadswith thesaid connecting rod will move the latter longitudinally forreleasing the said latch.

4.v A lock comprising a casing having a shackle mounted thereon andprovided with a latch pivotally mounted to engage-the shackle. a bracketmounted in the casing, a

pair of barrels rotatably 'mounted' on the bracket and provided withhelical threads extending partially around each barrel to after the saidconnecting rod has been re- 10 provide spaces between the terminals ofthe leased from engagement with the threads. threads, an operating rodengageable with In testimony whereof I aliX my signature the latch7 aCronreeting rod carried lliy th in presence of two witnesses.

operating ro an coperating witi t e sai threads to move the operatingrod when the CHARLIE W PETERSON' said barrels are rotated, and anexpansible Witnesses:

element mounted on the operating rod for RODOLPHE SANDOZ,

movingthe latter back to normal position AMI F. SANDoz.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

